Magnetic screw driver



Nov. 18, i924- 1,516,042 H. R. HlNEs l MAGNETILC SCREW DRIVER Filed may17. 192:5

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' andma Nov. 18,

i S n Alfil@ if) HOWARD Ross rimas, or wAasAw, INDIANA.

MAGNETIC sonnw nerven;

Application enea my 1 7, 192s. Iserial No. 639,563.

To. all whom it may concern.'

Be it known that I, HOWARD R. HINES, a citizen of the United States,residing at Warsaw, in the county of 'Kosciusko and State of Indiana,have invented certain new.

and useful lmprovements in Magnetic Screw Drivers, of which thefollowing a specification.

My invention 'relates to a screw driver', the blade of which may bemagnetizedwhen in use to pick up and hold iron and steelv screws whenplacing them in position for tightening.

It is very diiiicult to place screws in position. for tightening Ainvdeep recesses or narrow passages, particularly in sundry. places onautomobiles. With the screw driver forming the subject matterV of thepresent invention, such diiculties are over-` come, as by simplyoperating a switchen the handle of vthe screw driver, the point of theblade becomes magnetic 'and will holdthe screw until positioned linprovided for the same.

'It is also found very diflicult to remove 'the screws from dee'recesses or narrow passages after they ave been unscrewed from theirseats, and also in this case, the

the aperture magnetic screw driver will be very useful to remove thelooseI screws or bolts or even washers and nuts from such places onauto-- mobiles or other machinery, or any other similar steel and ironpar-ts fallen into the pan or crank case of an` automobile.

Another advantage of having a screw driver, the blade of which can bemagnetized when needed, resides in the fact that it is only a" Afewmomentsv that the blade need to be in condition to hold 4a screwthereon, and that at other times. it is more advantageous to have -ascrew driver thatv is not inagnetized.l Directly the screw has beeninserted and started in the aperture "made for the same, the switch ismade to breakthe currentl thereby demagnetizing the blade. v v

In the accompanying hocliment of the invention isfillustrated;

Figure lshows a of the present int'ention; and

Figure 2 2 of Figure 1. 1" the drawing, reference numeral 10 drawing,one em-v 'iongitadinaiseaion or the screw driverv forming thesubjectmatter is a transverse section along linerepresents the bladepreferably made of soft iron with the exception of the. workin vend 11,which may be made. of tough stee so as to take hardening. The upper endof the blade has preferably a square sectioned shank 13 'which isinserted in the wooden handle A14. The handle is bored at its upper endto 'provide' a chamber 15 for a dry cell 16. This cell is an ordinaryone and one-half -volt iashy light cell having a cylindricall metalliccasing, and the cham ber 15 is large enough to permit a close fit' forthe cell therein." The cell is held in position bymeans of a coil spring17 which in Figure 2. A'brass button 19 deposited in the bottom of thechamber 15 is ada ted toucontact with the positive pole 20 o the cesecured, by means of screws or the like, a ferrule22 preferably ofbrass, extending downwardly along the shank of the blade 10 and engagingfirmly therewith with its closed bottom portion 23. t'

Within the ferrule, which forms a roomy compartment 24 around the blade10, is housed a coil wire'25. Thisl wire is preferrial forming a goodconductor and covered with a double layer of cotton or silk providinginsulation between the coils. One end of this coiled wire runs along theshank of the blade and is secured as at 26 to the brass button 19, whilethe other end thereof At 'the lower end of the handle y14: is A ablymade of copper or some similar mateled by a suitable passage 22' to ametallic stud 28 secured in the handle. A contact spring 29 pressesagainst the metallic side ofthe cell 16 and is heldfirmly in the handle14 by means of a securing pin 30 which is associated with a nger 31,upon which the A.switch button t32 is adapted to slide. As

seen in Figure 1, this switch button is in open position, and in orderto close the cirjv cuit, the` button has to be pushed down-g.A

current to run throug thereby closing the gag the coiled wire' 2551.,

wardly until it contacts with the stud 28,

and permitting the* The switchhutton 32 is? 1n e convenient I' 'positionto he'shiftedhy the thumb or nger ofthe operator Whenever he needs topick up a screw or other 'iron or steel part, after which it may heimmediately released by throwing hack ,the switch button 32. into openpositicn.. l The ferrule Qloes not enlj'/ form e guide fonthe screwdriverfhlede l0 hy providing andzextension' to the handle 14,* lout alsofurnishes e shield `or guertl for the magnet coil 25, thus protecting itfrom damage.,

linsteetl of rovioling e seperate spring 29 for melting tie cntect withthe negative pole of the cell, `the spring 1'? might else per form thisdntylifproperly connected with the switch n er-lt; s

When the h este `is megnetized to pickup an ordinary slotted 'Wood screwor stove holt, there are three megnetized points; namely two sioles entithe l-hottonn of the sc-rew'slot, thus holding the screw securely untilstarted in the openinjg prorieled therefor, whereuponv the switchhutton'-.ieretrected to breek the current end elemegnetlzethe blade;

f leeetaf time guettent @te @time ty en t Havin'thus described theinvention, Whet is claime as new is:

A screwdriver comprising ehentlle heving one solid enel, havinge'chemher in 'its opposite end and heving at recess in its side, a.blade secured in and projecting from the solid. end of the handle, econtact button on the wall of the chemher in the hendle, ,e l ,fixedcontact'element housecl in the recess in the side oi the hendle, si'coil around the blade heving its ends passing through the solid end ofthe handle out of Contact with and insulated. from the blade andconnected to seid button and said contact element respectively, ebattery cell inthe chamber of s the handle having one terminel incontect with seid button, e conductor housed in handle and having oneend in contact with theother terminal of thehettery cell9A e fingerforming e continuetion of the ce posite end :of seid conductor enelextending longitudinellycf end; housed Within the re cess in the side ofthe handle, and e switch'

